1907.] 



MOXKErS OF THE GENUS CERCOPITHECUS. 



723 



being adult females. The others wei-e an adult male from 

 Samkitta-Og-owe(? Samkitta on the Ogoue) ; a very young specimen 

 of doubtful sex, a semi-adult male, and an adult female from San 

 Benito ; an adult male from Ogoue ; and two adult males from the 

 Forest of Mayumba. That the difference is not attributable 

 either to age or sex, is pro\ed by the fact that all the specimens 

 known from the Benito River and San Benito in the British and 

 Paris Museums, whether old or young, male or female, have the 

 tail red. Moreover, Pousargues lays stress upon the fact that all 



Text-fio-. 187. 



Cercopitliecus cepJius Liii;;. 

 (From a young specimen living in the Society's Gardens.) 



the specimens known to him with tails coloured like the body 

 were females. But in the British Museum there is a male 

 specimen, just adult, as shown by its teeth, in which the tail is also 

 coloured in that way. This example is ticketed " Gaboon {Laglaize 

 Coll., 80.6.7.3)." In addition to this, there are two skins in the 

 collection of the Society, ticketed W. Africa, which resemble 

 the above-mentioned Gaboon specimen in the similarity in colour 

 between the tail and the body. They also resemble it, and differ 



